But the style comes with a hefty price tag: extensions can cost up $1,500 at top salons, adds Gibson. Budget-conscious, fear not: The stylist to the stars is coming out with affordable line of clip-ons, available on qvc.com (in eight colors) March 28.

"You can get the same instantaneous glamour like Katie – for $149," he adds. "And with regular care – washing and brushing – they can last up to two years."